# std::span<T,Extent>::empty

From cppreference.com
< cpp‎ | container‎ | span

constexpr bool empty() const noexcept; |  | (since C++20)

Checks if the span is empty.

### Parameters

(none)

### Return value

true if the span is empty (i.e., size() == 0); false otherwise.

### Example

Run this code

    #include <iomanip>
    #include <iostream>
    #include <span>

    int main()
    {
        std::span<const char> span{"ABCDEF"};

        while (!span.empty())
        {
            std::cout << std::quoted(span.data()) << '\n';
            span = span.last(span.size() - 1);
        }
    }

Output:

    "ABCDEF"
    "BCDEF"
    "CDEF"
    "DEF"
    "EF"
    "F"
    ""

### See also

size (C++20) | returns the number of elements in the sequence (public member function)

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